25978992788 has 24 divisors (see below), whose sum is σ = 51961400064. Its totient is φ = 11133122400.

The previous prime is 25978992757. The next prime is 25978992883. The reversal of 25978992788 is 88729987952.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 802598 + ... + 834338.

It is an arithmetic number, because the mean of its divisors is an integer number (2165058336).

Almost surely, 2^25978992788 is an apocalyptic number.

25978992788 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25978992788 is an abundant number, since it is smaller than the sum of its proper divisors (25982407276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25978992788 is a wasteful number, since it uses less digits than its factorization.

25978992788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60983 (or 60981 counting only the distinct ones).

The product of its digits is 365783040, while the sum is 74.

The spelling of 25978992788 in words is "twenty-five billion, nine hundred seventy-eight million, nine hundred ninety-two thousand, seven hundred eighty-eight".